S
M
T
W
T
F
S
28
94°
73°
29
95°
74°
30
96°
74°
1
95°
73°
2
96°
73°
3
94°
76°
4
93°
71°
5
89°
70°
6
86°
71°
7
88°
73°
8
88°
72°
9
88°
71°
10
89°
71°
11
84°
72°
12
88°
71°
13
89°
68°
14
92°
70°
15
92°
72°
16
91°
76°
17
92°
74°
18
95°
76°
19
90°
75°
20
91°
71°
21
92°
73°
22
82°
62°
23
79°
64°
24
76°
67°
25
85°
73°
26
90°
74°
27
97°
73°
28
96°
72°
29
89°
69°
30
88°
67°
31
92°
67°
1
92°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Petersburg
Petersburg's July 2026 forecast shows daily high temperatures ranging from 76° to 97°, with overnight lows between 62° and 74°. The average high for July is 88° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Petersburg. See also: August | September | October.
